media: i2c: max96714: add HAS_EVENTS support

Controls can be exposed to userspace via a v4l-subdevX device, and
userspace has to be able to subscribe to control events so that it is
notified when the control changes value.
Add missing HAS_EVENTS support: flag and .(un)subscribe_event().

Signed-off-by: Tommaso Merciai <tomm.merciai@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/i2c/max96714.c b/drivers/media/i2c/max96714.c
index 159753b13777cb45e5b57209bfa67f7e932dac4e..2257b6b807eac53368476d0a95dfa6b5ee0e64e3 100644 (file)
--- a/drivers/media/i2c/max96714.c
+++ b/drivers/media/i2c/max96714.c
@@ -17,6 +17,7 @@
 
 #include <media/v4l2-cci.h>
 #include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
 #include <media/v4l2-fwnode.h>
 #include <media/v4l2-subdev.h>
 
@@ -488,6 +489,8 @@ static int max96714_log_status(struct v4l2_subdev *sd)
 
 static const struct v4l2_subdev_core_ops max96714_subdev_core_ops = {
        .log_status = max96714_log_status,
+       .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+       .unsubscribe_event = v4l2_event_subdev_unsubscribe,
 };
 
 static const struct v4l2_subdev_video_ops max96714_video_ops = {
@@ -602,7 +605,8 @@ static int max96714_create_subdev(struct max96714_priv *priv)
                goto err_free_ctrl;
        }
 
-       priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
+       priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
+                         V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_STREAMS;
        priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
        priv->sd.entity.ops = &max96714_entity_ops;